SN74LVC8T245
- Fully configurable dual-rail design allows each port to operate over the full 1.65V to 5.5V power-supply range
- Robust, glitch-free power supply sequencing
- Control inputs VIH/VIL levels are referenced to VCCA voltage
- VCC isolation feature and VCC disconnect feature
- if either VCC input is below 100mV or left floating, all I/O outputs are disabled and become high- impedance state
- Ioff supports partial-power-down mode operation
- Latch-up performance exceeds 100mA per JESD 78, class II
- Operating temperature from -40°C to 85°C
- ESD protection exceeds JESD 22
- 4000V Human-Body Model (A114-A)
- 1000V Charged-Device Model (C101)
The SN74LVC8T245 is an eight bit non-inverting bus transceiver with configurable dual power supply rails that enables bidirectional voltage level translation. The SN74LVC8T245 is optimized to operate with VCCA and VCCB set at 1.65V to 5.5V. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.65V to 5.5V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.65V to 5.5V. This allows for universal low-voltage bidirectional translation between any of the 1.8V, 2.5V, 3.3V, and 5.5V voltage nodes.
The SN74LVC8T245 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input and the output-enable (OE) input activate either the B-port outputs or the A-port outputs or place both output ports into the high-impedance mode. The device transmits data from the A bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs are activated.
The input circuitry on both A and B ports is always active and must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. The VCC isolation feature is designed so that if either VCC input is at GND, then all outputs are in the high-impedance state. To put the device in the high-impedance state during power up or power down, tie OE to VCC through a pullup resistor; the current-sinking capability of the driver determines the minimum value of the resistor.
The SN74LVC8T245 is designed so that the control pins (DIR and OE) are supplied by VCCA.
技術文件
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOIC (DW) | 24 | Ultra Librarian |
| SOP (NS) | 24 | Ultra Librarian |
| SSOP (DB) | 24 | Ultra Librarian |
| SSOP (DBQ) | 24 | Ultra Librarian |
| TSSOP (PW) | 24 | Ultra Librarian |
| TVSOP (DGV) | 24 | Ultra Librarian |
| VQFN (RHL) | 24 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中的可靠性監測
- 晶圓廠位置
- 組裝地點